Improvement in variable exhausts for locomotives



G. S. BRAINERD. Variable Exhaust for Locomotive..

No. 202,145. Patented April 9, 187.8. I

ATTORNEYS.

UNITED STATES PATENT OFFICE.

GEORGE s. BRAINERD, OF sT. ALBANs, vERMoNT.

IMPROVEMENT IN VARIABLE EXHAUSTS FOR LOCOMOTIVES.

' Specification forming part of Letters Patent No. 202,145, dated April 9, 1878; application filed March 7, 1878.

To all whom it may concern:

Be it known that I, GEORGE SEGUR BRAIN- ERD, of St. Albans, in the county of Franklin and State of Vermont, have invented a new and Improved Variable Exhaust for Locomotives, of which the following is a specification:

Figure l is a plan view of my improved variable exhaust. Fig. 2 is a vertical section taken on line as m in Fig. 1. Fig. 3 is a plan view of a modified form of my improvement.

Similar letters of reference indicate correspondin g parts.

My invention relates to blast-nozzles for 10- comotives and other engines; and it consists in a casting adapted to the center casting of the locomotive, and having in its head or upper end exhaust nozzles and ports, and having a movable plate carrying exhaust-nozzles for controlling the exhaust.

Referring to the drawing, A is a casting having two passages, a, which coincide with the exhaustpassages of the center casting of the locomotive. These passages are open at the bottom, and the casting is secured to the center casting by bolts passing through the flange a.

In the top of the casting there are two ports, 0, one in each passage a. At the center of the top of the casting A there is a boss, 0, from which two nozzles, b, project vertically. These nozzles are in communication with the passages a. Upon the top of the casting Ais placed a plate, B, which is apertured to receive the boss e, and is provided with two nozzles, d, which are similar to the nozzles b, and are placed so that by turning the plate B the nozzles 01 may be made to coincide with the ports 0.

lhe motion of the plate B is limited to the opening and closing of the ports by slots in the plate and studs projecting from the casting A through the said slots.

When the plate B is turned so that the nozzles b d are in a straight line, the nozzles 01 coincide with the ports 0 and the exhaust escapes from all of the nozzles; but when it is desired to concentrate the exhaust so as to produce a blast, the ports 0 are closed by turning the plate B, the said plate being provided with an operating-rod that extends to the cab of the locomotive.

The modification represented in Fig. 3 consistsin the elongated and curved nozzles 11, which extend to the center line of the exhaustnozzle. I

Havin g thus described my invention, I claim as new and desireto secure by Letters Patcut-- The combination, with the casting A, having the fixed exhaust-nozzles b and ports 0, of the nozzles d, arranged on plates B and made adjustable to said ports, as and for the' purpose specified.

GEORGE SEGUR BBAINERD.

Witnesses G. SEDGWIOK, Gno. M. HOPKINS. 

